The method of selecting decoupling capacitors for specific applications is also very popular. If a certain frequency is found to have large interference on the circuit board, it is necessary to select an appropriate capacitor for this frequency to improve the system design. In short, the design of the power system is closely related to the specific application, and there is no one-size-fits-all specific solution. The key is to master the basic design methods and analyze the specific situation in order to solve the problem of power supply decoupling well.